Mental Math
Wake up your mind with adding and subtracting
Play nowFree printable worksheets
Saerok is a brain-training playground where games that help with early dementia and mild cognitive decline are free to play. It works on a computer, a tablet or a phone, and if the screen is hard to use you can print the puzzles instead.
Five levels
- 1. First steps — Single digits, adding · answers up to 10
- 2. Gentle — Single digits, adding and subtracting
- 3. Easy — Two digits ± one digit · no carrying
- 4. Normal — Two digits ± two digits · with carrying
- 5. Hard — Two digits, and three numbers in a row
Scoring
| Level | Level 1 single-digit adding · 2 adding and subtracting · 3 two ± one digit (no carrying) · 4 two ± two digits · 5 three numbers in a row |
|---|---|
| Correct answers | Up to 600 · in proportion to correct answers |
| Time bonus | Up to 300 · only if you finish, in proportion to time left |
| Streak bonus | Up to 100 · 3 in a row 25 / 4 in a row 50 / 5 in a row 75 / 6 or more 100 |
| Wrong-answer penalty | None — a wrong answer just shows the right one and moves on |
| Level bonus | Normal +100, Hard +250 (when you finish) |
| Top score | Levels 1–3: 1,000 · Normal: 1,100 · Hard: 1,250 |
| Keyboard | On a computer: number keys to type, Backspace to erase, Enter to confirm |
I went looking online for puzzles for my mother, who lives with dementia, and found it far too hard to find good ones — so I made these for her. I am putting them here in the hope that they help someone else too.